Python multiprocessing keyword arguments
arguments, keyword-argument, multiprocessing, python
Solution
The dictionary you are using as keyword args should be passed in as the `kwargs` parameter to the `Process` object.
pool = [multiprocessing.Process(target=stretch, args= (shared_arr,slice(i, i+step)),kwargs=args) for i in range (0, y, step)]
Problem
Here is a simple example of using keyword arguments in a function call. Nothing special. ``` def foo(arg1,arg2, **args): print arg1, arg2 print (args) print args['x'] args ={'x':2, 'y':3} foo(1,2,**args) ``` Which prints, as expected: ``` 1 2 {'y': 3, 'x': 2} 2 ``` I am trying to pass the same style keyword arguments to a multiprocessing task, but the use of **, in the args list is a syntax error. I know that my function, stretch() will take two positional arguments and n keyword arguments. ``` pool = [multiprocessing.Process(target=stretch, args= (shared_arr,slice(i, i+step),**args)) for i in range (0, y, step)] ``` Is it possible to pass keyword arguments to a multiprocessing.Process? If so, how? If not, why?